Multi-step reaction with 10 steps
1: 87 percent / dimethylsulfoxide / 72 h / 120 °C
2: 92 percent / Et3N / CH2Cl2 / 1 h
3: NaN3 / dimethylformamide / 5 h / 80 °C
4: 85 percent / H2; AcOH / Pd/C / dioxane / 4 h / 20 °C
5: (i-Pr)2NEt / dimethylformamide / 10 h / 125 °C
6: 5.78 g / NaOH / methanol; tetrahydrofuran; H2O / 8 h / 40 °C
7: 1-hydroxybenzotriazole hydrate; N-methylmorpholine; 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride / dimethylformamide / 13 h
8: 86 percent / H2 / Pd/C / tetrahydrofuran / 12 h / 20 °C
9: (i-Pr)2NEt / dimethylformamide / 1.5 h / 20 °C
10: 59 percent / BBr3 / 1,2-dichloro-ethane / 2.5 h / 40 °C
With
4-methyl-morpholine; sodium hydroxide; sodium azide; hydrogen; boron tribromide; acetic acid; 1-hydroxybenzotriazol-hydrate; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; N-ethyl-N,N-diisopropylamine;
palladium on activated charcoal;
In
tetrahydrofuran; 1,4-dioxane; methanol; dichloromethane; water; dimethyl sulfoxide; 1,2-dichloro-ethane; N,N-dimethyl-formamide;
DOI:10.1016/j.bmc.2005.10.061